Black resigned. There could follow 25...Kg8 26.Rg7+ Kh8 27.Qh4+! Kxg7 28.Qh7+ Kf8 29.Qh8+ Ke7 30.Qg7+ Ke8 31.Qg8+ Ke7 32.Qf7+ Kd8 33.Qf8+ Qe8 34.Nf7+ Kd7 35.Qd6#.

The black king is weakened, and White brings up additional forces:

The correct idea in an inaccurate form. More accurate was the preparatory 17.Rab1!, and only after 17...b5 (on 17...Qc7, there is the strong 18.c4!, and 18...dxc4 is impossible because of 19.Re4) 18.Re3 – with the same threat of g3-g4.

Black misses the chance to save himself by a pawn sacrifice to activate his pieces: 17...Nd7! 18.g4 Nxe5 19.dxe5 f5 20.Rh3 Rf7 21.gxf5 Qb6!, at the same time defending g6 and aiming at f2. White’s pawn structure is broken, and so his winning chances are few, and the most likely outcome is a draw.

Exploiting the dark squares, White conducts an attack.

Now, there is another possibility – a knight on f6 and a rook on h3.

In view of the threat 31.Rxh5, Black resigned.

It is noticeable that the white queen and knight are on the queenside, leaving the king without sufficient defence. Black finds a way to bring additional pieces up, and forces White into an unpleasant defence:

Panic, which results in an irreparable weakening of the light squares. It was essential to cover them: 16.f3!. After 16...Rh6 17.g3 Qe3+ 18.Rf2 f5, Black still has some initiative, but no more than that.

16...Rh6 17.g3 Qf3 18.Rd3 Qh5 19.h4 g5! 20.Rxd6

The best chance was 20.e5!, trying to organise counterplay on the dark squares. Admittedly, after 20...d5! 21.Qe7 gxh4
22.Ne4 Bf5 23.Nf6+ Rxf6 24.Qxf6 Bxd3 25.cxd3 Re8 26.d4 hxg3 27.fxg3 Re6, Black has an extra pawn for no compensation.